This magnetic latch coil is bistable. It includes a permanent magnet and two windings which require a single pulse to switch. This offers the following advantages:● Energy savings (especially important for battery powered equipment)● Bistable function: a monostable valve (with spring return or differential) maybe converted into a bistable device● Smaller dimensions and fewer connections than in standardelectropneumatic bistable valves (a single pilot valve is necessary instead of two)● Fail safe even in case of power loss● No heating